单项选择题
A. show users B. show connected C. show subscribers D. show ip subscribers
Which configuration command limits the number of connec...
单项选择题Which configuration command limits the number of connections supported on a single PPPoE major interface?（）
A.sessions B.sa-validate C.split-horizon D.duplicate-protection
Which configuration command prevents a client from esta...
单项选择题Which configuration command prevents a client from establishing multiple PPPoE connections from a single workstation?（）
A. sessions B. sa-validate C. split-horizon D. duplicate-protection
A metro Ethernet user is connected using a PPP over Eth...
单项选择题A metro Ethernet user is connected using a PPP over Ethernet service.How many Layer 2 headers are attached to each IP datagram?（）
A.1 B.2 C.3 D.4
